details[open] > ul,
details[open] > div {
    animation: expand 0.3s ease-out forwards;
}

details:not([open]) > ul,
details:not([open]) > div {
    animation: collapse 0.3s ease-in forwards;
}

@keyframes expand {
    0% {
        opacity: 0;
        transform: scaleY(0.9);
    }
    100% {
        opacity: 1;
        transform: scaleY(1);
    }
}

@keyframes collapse {
    0% {
        opacity: 1;
        transform: scaleY(1);
    }
    100% {
        opacity: 0;
        transform: scaleY(0.9);
    }
}

.menu li summary {
    cursor: pointer;
    transition: background-color 0.2s;
}
.menu li summary:hover {
    background-color: hsl(var(--b2));
}

body {
    overflow-x: hidden;
}